1 files changed, 218 insertions, 0 deletions

diff --git a/lib/skin_parser/skin_scan.c b/lib/skin_parser/skin_scan.c
new file mode 100644
index 0000000000..79f7162aab
--- /dev/null
+++ b/lib/skin_parser/skin_scan.c
@@ -0,0 +1,218 @@
+/***************************************************************************
+ *             __________               __   ___.
+ *   Open      \______   \ ____   ____ |  | _\_ |__   _______  ___
+ *   Source     |       _//  _ \_/ ___\|  |/ /| __ \ /  _ \  \/  /
+ *   Jukebox    |    |   (  <_> )  \___|    < | \_\ (  <_> > <  <
+ *   Firmware   |____|_  /\____/ \___  >__|_ \|___  /\____/__/\_ \
+ *                     \/            \/     \/    \/            \/
+ * $Id$
+ *
+ * Copyright (C) 2010 Robert Bieber
+ *
+ * This program is free software; you can redistribute it and/or
+ * modify it under the terms of the GNU General Public License
+ * as published by the Free Software Foundation; either version 2
+ * of the License, or (at your option) any later version.
+ *
+ * This software is distributed on an "AS IS" basis, WITHOUT WARRANTY OF ANY
+ * KIND, either express or implied.
+ *
+ ****************************************************************************/
+
+#include <stdio.h>
+#include <ctype.h>
+#include <stdlib.h>
+#include <string.h>
+
+#include "skin_scan.h"
+#include "skin_debug.h"
+#include "symbols.h"
+#include "skin_parser.h"
+
+/* Scanning Functions */
+
+/* Simple function to advance a char* past a comment */
+void skip_comment(char** document)
+{
+    while(**document != '\n' && **document != '\0')
+        (*document)++;
+    if(**document == '\n')
+        (*document)++;
+}
+
+void skip_whitespace(char** document)
+{
+    while(**document == ' ' || **document == '\t')
+        (*document)++;
+}
+
+void skip_arglist(char** document)
+{
+    if(**document == ARGLISTOPENSYM)
+        (*document)++;
+    while(**document && **document != ARGLISTCLOSESYM)
+    {
+        if(**document == TAGSYM)
+        {
+            (*document)++;
+            if(**document == '\0')
+                break;
+            (*document)++;
+        }
+        else if(**document == ARGLISTOPENSYM)
+            skip_arglist(document);
+        else if(**document == ENUMLISTOPENSYM)
+            skip_enumlist(document);
+        else if(**document == COMMENTSYM)
+            skip_comment(document);
+        else
+            (*document)++;
+    }
+    if(**document == ARGLISTCLOSESYM)
+        (*document)++;
+}
+
+void skip_enumlist(char** document)
+{
+    if(**document == ENUMLISTOPENSYM)
+        (*document)++;
+    while(**document && **document != ENUMLISTCLOSESYM)
+    {
+        if(**document == TAGSYM)
+        {
+            (*document)++;
+            if(**document == '\0')
+                break;
+            (*document)++;
+        }
+        else if(**document == ARGLISTOPENSYM)
+            skip_arglist(document);
+        else if(**document == ENUMLISTOPENSYM)
+            skip_enumlist(document);
+        else if(**document == COMMENTSYM)
+            skip_comment(document);
+        else
+            (*document)++;
+    }
+
+    if(**document == ENUMLISTCLOSESYM)
+        (*document)++;
+}
+
+char* scan_string(char** document)
+{
+
+    char* cursor = *document;
+    int length = 0;
+    char* buffer = NULL;
+    int i;
+
+    while(*cursor != ARGLISTSEPERATESYM && *cursor != ARGLISTCLOSESYM &&
+          *cursor != '\0')
+    {
+        if(*cursor == COMMENTSYM)
+        {
+            skip_comment(&cursor);
+            continue;
+        }
+
+        if(*cursor == TAGSYM)
+            cursor++;
+
+        if(*cursor == '\n')
+        {
+            skin_error(UNEXPECTED_NEWLINE);
+            return NULL;
+        }
+
+        length++;
+        cursor++;
+    }
+
+    /* Copying the string */
+    cursor = *document;
+    buffer = skin_alloc_string(length);
+    buffer[length] = '\0';
+    for(i = 0; i < length; i++)
+    {
+        if(*cursor == TAGSYM)
+            cursor++;
+
+        if(*cursor == COMMENTSYM)
+        {
+            skip_comment(&cursor);
+            i--;
+            continue;
+        }
+
+        buffer[i] = *cursor;
+        cursor++;
+    }
+
+    *document = cursor;
+    return buffer;
+}
+
+int scan_int(char** document)
+{
+
+    char* cursor = *document, *end;
+    int length = 0;
+    char buffer[16];
+    int retval;
+    int i;
+
+    while(isdigit(*cursor) || *cursor == COMMENTSYM || *cursor == '-')
+    {
+        if(*cursor == COMMENTSYM)
+        {
+            skip_comment(&cursor);
+            continue;
+        }
+
+        length++;
+        cursor++;
+    }
+    if (length > 15)
+        length = 15;
+    end = cursor;
+    /* Copying to the buffer while avoiding comments */
+    cursor = *document;
+    buffer[length] = '\0';
+    for(i = 0; i < length; i++)
+    {
+        if(*cursor == COMMENTSYM)
+        {
+            skip_comment(&cursor);
+            i--;
+            continue;
+        }
+
+        buffer[i] = *cursor;
+        cursor++;
+
+    }
+    retval = atoi(buffer);
+
+    *document = end;
+    return retval;
+}
+
+int check_viewport(char* document)
+{
+    if(strlen(document) < 3)
+        return 0;
+
+    if(document[0] != TAGSYM)
+        return 0;
+
+    if(document[1] != 'V')
+        return 0;
+
+    if(document[2] != ARGLISTOPENSYM
+       && document[2] != 'l'
+       && document[2] != 'i')
+        return 0;
+
+    return 1;
+}